Licensing / Server

Hi,

I would like to create a mobile web app using Sencha Touch 2.
There are several questions I want to ask here, can I use my own server(company)? or Sencha limit us must use their server? Sorry but I couldn't found any resources out there.

For example, my application will let peoples to register their name, password and etc. I want all these data to be store in my server rather than others(Sencha's server). Can we do that? The application might push to the market after well developed. If we use Sencha's server, how much they will charged? Charge per user?

actually we don't even offer servers for hire, since we have a strong focus on client side development. sencha touch offers various different proxies and reader you can connect to any backend you like to.

the only backend we do offer is our cloud solution sencha.io, which is for free as long as it is in beta state. i do not know how / if this will change as soon as it hits ga.